a-3=2a+4=20=a+27

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Solution for a-3=2a+4=20=a+27 equation: 



a-3=2a+4=20=a+27

We move all terms to the left:

a-3-(2a+4)=0

We get rid of parentheses

a-2a-4-3=0

We add all the numbers together, and all the variables

-1a-7=0

We move all terms containing a to the left, all other terms to the right

-a=7

a=7/-1

a=-7

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